Vehicle brake



' y 1936. F, w. BENNINGTON 2,048,053

VEHICLE BRAKE Filed Aug 16, 1934 ,7 -zL@'. 3 v

i 'razzif W567i Patented July 21, 1936 ={UNITED"sTATEs PATENT OFFICE I VEHICLE ru ns V Frank w. Bennington, PortisfKana, assig'noiof one-half to Roy L. Hamilton, Beloit, Kans.

, A l Application August 16, 1934, SerialNo. 740,158 i 8 Claims. (01.188-78) This invention'is a vehicle brake primarily intended for motor vehicle use, but not limited to such use.

A One of the objectsof the invention is to provide-a simple brake of the character mentioned,

in which the parts are so constructed and arranged as to apply equalized pressure. simultaneously to all of the brake shoes during the braking operation. A further object is to provide means 101 so supporting the brake shoes, that they are constrained to travel in rectilinear paths which are disposed radially with respect .to the brake drum. A further. object is to provide an inexpensive form of, braking mechanism constructed of few partsin such manner that a maximum of braking power is obtainable with, a minimum number of parts, and so constructed and arranged that it will not readily get out of order, and with the parts readily accessible, so that repairs and 0 *replacements may be quickly and easilyefiected.

The invention will be hereinafter fully set forth and particularly. pointed out in the claims.

In the accompanying drawing:--

. Figure 1 is a side elevation illustrating a braking mechanism constructed in accordance with the invention. Figure 2 is a horizontal sectional viewon the'line 2-2, Figure 1. Figures 3 and 4 are detail side and rear views, respectively, illustratlng one of the brake shoes.

Referring to the drawing, |0 designates a supporting platewhich is adapted to be supported in suitable manner by the vehicle, and provided with a central opening for the passage of the wheel hub (not shown) One or more brake shoe anchor-studs II are secured to plate ID in such manner as to project inwardly. Each stud is of elliptical cross section, as shown, and provided at one end with V a threaded shank I2, projected through anopening in the plate l0, and retained in positienby a nut I3. It will be observed that the studs H are disposed diametrically opposite to each other so that an imaginary line connecting them would pass through the center of the opening in the plate I0.-

Slidably mounted on each anchor stud H, is a sleeve l4, having an elliptical bore l5, complemental tothe, stud, the longer diameter of the bore, however, being greaterthan the corresponding diameter of the stud, so that the sleeve may slide upon the stud without rotating. It will be noted that the longer diameter of the stud is arranged radially with respect to the brake drum B, so that all sliding movements of the sleeve l4 are in radial directions.

Each brake shoe S is of arcuate form and complemental to the flange of the brake drum, and is provided with relatively spaced hub portions l6 and IT, to receive a sleeve I4. Bushings l8 and I! are interposed between the periphery of each 60 sleeve l4 and the inner surfaces of the hub portions I6 and I1, said bushings being relatively spaced with respect to each other. The arrangement is such that the brake shoe is mounted upon and slidablewith the sleeve l4, so that the arcuate portion thereof is moved in radial paths toward and away from the flange of the brake drum. It will be noted that the hub portions I6 tween the bushings and I9, thereof. The other end of said arm 20 is provided with a double ring or fork portion 24 which encircles the reduced portion 23 of the cam 22. One end of the arm 20a is provided with a collar portion to encircle a sleeve M in the same manner as the arm 20, the other end of said arm 20a having a thin collar portion 25, adapted to encircle the reduced portion 23 of the cam 22, between the separated collar portions 24 of the arm 20. The collar portions of the arms 20 and 20a which encircle the sleeves I4, together with the bushings l8 and I9, are retained in place by means of cover plates 26, through which extend projections 21 of the stud said plates being held in position by suitable means, such as cotter pins 28. The ends 24 and 25 of the brake arms are retained in position in engagement with the cam portion 23, by means of a cover plate. 29, which is removably maintained in place by a screw 30. The shaft 2| is rotated by any suitable means, such as a radial arm 3|, connected to a brake pedal or other operating means (not shown).

In operation, when the brake pedal is moved to braking position, the shaft 2| is rotated, thereby imparting corresponding rotation to the cam 22. The effect of this is to push the brake rods 20 and 20a in such manner as to slide the sleeves transversely of the studs ll, thereby moving the brake shoes in opposite radial directions toward Theadvantages of the invention will be readily understood by those skilled in the art to which it belongs. For instance, it will be observed that by moving the brake shoes in radial paths the braking power is uniformly applied by all of ments, when required, may be made quickly and" without difficulty. A very important advantage;

10 is the great power'and brakingeflicier cy that may be applied to the brake 'drumflbygthe' use of the eccentric and the described intermediate con ing provided with means. so .constructed and ar-' ranged that the sleeve is free to move transversely of the stud in' a radial direction with respect to the brake drum but is held against rotation during such movement, brake shoeshaving 6' portions between their ends mounted on said sleeves, and means for moving'the sleeves trans- 7 versely of said studs. 7 i; Albrake of the character described, comprising a supporting plate, a brake drum operable 10 {adjacent theretqfelliptical anchor studs secured to said"plate','"'sleeves mounted on said studs,

nections between said eccentrioland-the hrakei'. each sleeve having anielliptical bore complemenshoes. tal to itsi stud but with its larger diameter vention and; described an operative manner, of constructing andvus'ing the .s.ame,.although'with out .attemptingto setlforthallof the formslin which it may be made, or all of the forms of its 2Q; use, what is claimedist+ H .a? s 1; 1. A1 brake of the character described comprising a'supporting plate, ia-; brake.,.drum operable. adjacent thereto,,,anch0r studsj,-securedto said plate at diametrically opposite positions, sleeves 2Q gmounte'd on saidstuds, saidsleeves and'said studs being so relativelyoonstructed andarranged that the sleeves are free to slide transversely of the studs and radially with respect. tosaiddruimbut are held, againstrelative rotatiom, brake shoes 0 .mounted on 'said sleeves andnhavingi braking surfaces so positioned: as to be .engageable with the brake drum, and means foreifecting sliding movement of said sleeves and the braketshoes carried thereby. "1'. L I. V 2. A brake. ofthe character described. comprising a-supporting plate, a brake. drum operable adjacent thereto,- anchorizstuds of elliptical cross. section secured to said. plate at diametrically op;

. posite positions,...sleeves having elliptical bores 49; movably engaging said studs,the larger diameters p of said bores.being.-greater;than the correspond- 1 ing diameters of .-said;studs, sothat the sleeves are movable transverselyof the studs and radially. with respect to said drum, but.;are prevented..-

:-from rotating thereon,v brake lshoeshaving por-;

tions between their ends mounted von-said sleeves,

and means for moving the sleeves transversely of the studs. J v

. 3. A brake of thelcharacter described compris- -91ing a supporting plate';-ia:brake;drum operable adjacent thereto, anchorstuds. secured to said plate at diametrically; opposite. positions; sleeves mounted on saidrstuds;saidsleeves and studs being providedwith means. so'constructed and ar- 55 ranged that the sleeves are freeLto .movetransversely of the studsand-radially with respect to said drum, but are held against rotation with re--- spect thereto, brake shoes mounted :on said sleeves, an eccentric rotativelylmounted on said mounted on saidfistudsgeach sleevetand-stud benuts engagingsaid threaded -portions in such; manner as to anchor the studs to the plate-sleeves Having thus explained the nature ofj the greater than the corresponding diameter of the 5 V stud;brake shoes each havingseparatedhub portionsre'ncircling a sleeve}; operating arm's 'leacli having a ring-like portion encircling a sleeve; and means for reciprocating said arms in such manner asto'impart movementuto the sleeves tran's s versely'of the studs. 111. r, it i Ti l ii a 6. A brake. of the characteridescribed compris ing agsupporting plate, a brake drum'operable adjacent thereto, studs of elliptical cross *sectior'isecured to said -plate,:sle eves of cylindrical forin i provided .with elliptical .i bores '-complemental to' said. .studs, the larger. diameters of saidrbores? being 'largerthan'jthe corresponding'diameter's, of

the studs, so that-the sleeves will} move transfversely. of the studs without rotating, brakeshoe s i carried by said sleeves, an operatingamember proe' .videdwith a'sha'ftportion rotatively mounted said-plate and also provideiwith a'ca'm poi'tio and brakearmshaving ring-like end partions encircling 'the: cam portion and 'eafch having' another ring-like vportion encircling a'sleeve;

7. A. brake of thelcharacter-describedcompri ing a supportin'gplate, a..-brak e drum operable adjacent thereto, i elliptical anchor studs projectingt from the inner fac'e ofsaid plate,-cylindri-' cal sleeves mounted on theres'pective'studs each sleevemhaving an elliptical -bore "cdmplem'errtal tm the stud but with its greater'diameter largerthan" the corresponding diameter 01? the stud; were" shoes mounted on therespective 'slevea opefating .arms for the respective sleeves, each arm having .a ring-like .end emimnn g a; sleeve actuating means engaging the other ends of" arms-infsuch manner as to impar't'movemen to" thesleeves transversely of the studsfi- I 8. A"brake of theicharacterZdescribed compri ing a supporting-plate,- abrake drunfioperab adjacent thereto, studs-of elliptical =eross sectio each having-one end secured to said plate -in sucl i manner as-to "projectfrom a face thereof; eye dr ical sleeves erig'a ging said studs} eacfisleeve; having an elliptical b'o're complement to its'stud butv with its greater diamete'r' longer" than the corresponding a r t "so manna-"6 sleeve is rreeto'mpve transversely lf 'the stud but is held'from rotation-thereon, operating arms'f each arm-having a ring-like portion at o'n e' end '1 encircling a sleeve, and a ring-like portioh 'at'th efl' other en an eccentric rotativelysupported by a said plate and liavi'ng' a cam portion engaged" by the last mentioned =en'ds flo'f saidarms,means for preventing movement of sai arms longitudie; nally with respect to said sftu and means- 201+ il if q e c m a-z WQBENNINGT preventing movement of said arms-longitudin 1e 

